May 23, 2014 ... It is used in pressed-wood products, such as particleboard, plywood, and ... Automobile exhaust is a major source of formaldehyde in outdoor air. ... Professional keratin hair smoothing treatments can contain formaldehyde or ... tumors, while another showed no increase in any kind of tumor or cancer.

Oct 3, 2016 ... Although it's easy to book the appointment and plop in a salon chair, what's ... or the outside layer, of the hair," says David Babaii, a celebrity hair stylist in ... formaldehyde as well as or only methylene glycol (a compound that can ... those that say they're natural, organic or formaldehyde-free may not stand ...